Rank theorem - Wikipedia

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From a short name: This is a redirect from a title that is a shortened form of a more complete page title, such as a person's full name or the unbroken title of a written work.
- Use this rcat (not {{R from initialism}} nor {{R from abbreviation}}) to tag redirects that are the initials of a person's name.

Mentioned in a hatnote: This is a redirect from a title that is mentioned in a hatnote at the redirect target. The mention is usually atop the target article. It may, however, be directly under a section header, or in another article's hatnote (whenever the hatnote is under a section, {{R to section}} should also be used).
- The titles of redirects mentioned in hatnotes may refer to a subject other than that of the target page. It is possible that this redirect may need to be retargeted, or become an article under its own title (see {{R with possibilities}}). If the title is a good candidate for a Wiktionary link, it may also be added.

When appropriate, protection levels are automatically sensed, described and categorized.